Streaming Web cam Video In Both Party

Hello to all, i need to develop an application that does VOIP call. In the same time, i need to send video capture from web cam to the callee.

I using pjlib for VOIP and QT for GUI.

http://nashruddin.com/Streaming_Open...k#introduction

I have this resources.

Do we need another thread for web cam frame grabber and one thread for voip calling ?

My task is to discover the callee IP using SIP URI register to public server. Then, i send the web cam to the calless' address.
How to discover IP after VOIP call of caller and callee ?

This is my final year project.

Please suggest the tool to use or idea to start.
I wonder does anyone do this before.
I plan to do this in Qt using QThread and QTcpSocket. Is this possible ? If yes, how to code ?

Code:

class InteractiveMultiTouchCommunicationSystem : public QMainWindow
{
private:
 Q_OBJECT
 
public:
 InteractiveMultiTouchCommunicationSystem(QWidget *parent = 0, Qt::WFlags flags = 0);
 ~InteractiveMultiTouchCommunicationSystem();
 
protected:
 
 // Show Context Menu created by createStandardContextMenu();
 // Event paramenet used to identify where mouse position event generated 
 // Implement KeyBoard shortcut Event
 void contextMenuEvent(QContextMenuEvent* );
 
//private SIGNAL:
 
 // 
 
// SLOT
private slots:
 
 // Main Slot
 void VOIPLogSlot();
 void VOIPCallRedialSlot();
 void VOIPCallRecordSlot();
 void VOIPCallRecordValidateSlot();
 void VOIPCallHoldSlot();
 void VOIPCallReInvite();
 void VOIPCallTransferSlot();
 
 void VOIPConfigSlot();
 
 void AddContactSlot();
 void DeleteContactSlot();
 void ManageContactSlot();
 
 void VOIPHistorySlot();
 
 void AboutSlot();
 void AboutQTSlot();
 
 
// Slot for Child Widget
 
 
 // VOIP Widget Slot
 void VOIPCallSlot();
 void VOIPHUSlot();
 void DialPadSlot();
 
 
 // VOIP Config Dialog Slot
 // First Tab
 void SIPSaveSlot();
 void SIPAddSlot();
 void SIPEditSlot();
 void SIPRemoveSlot();
 
 // Second Tab
 void NetworkSettingsSaveSlot();
 void NetworkSettingsDefaultSlot();
 
 // Third Tab
 
 
 // Add Contact Dialog Slot
 void AddContactDlgSlot();
 
 // Delete Contact Dialog Slot
 void DeleteContactDlgSlot();
 
private:
 
 Ui::InteractiveMultiTouchCommunicationSystemClass ui;
 
 // ToolBar
 QToolBar* myTB;
 
 // Menu
 QMenu* VOIPMenu;
 QMenu* ConfigurationMenu;
 QMenu* HistoryMenu, *NestedVOIPMenu;
 QMenu *ContactsMenu, *HelpMenu, *ExitMenu;
 
 // Action
 QAction* VOIPInfoAct, *VOIPRedialAct, 
  *VOIPRecordAct, *VOIPHoldAct, 
  *VOIPReinviteAct, *VOIPTransferAct;
 
 QAction* VOIPConfigAct;
 QAction* IncomingVOIPHistoryAct, 
  *OutgoingVOIPHistoryAct, *MissedVOIPHistoryAct, 
  *ReceivedVOIPHistoryAct; 
 
 QAction* AddContactAct, *DeleteContactAct, 
  *ManageContactAct;
 
 QAction* AboutAct, *AboutQTAct;
 QAction* ExitAct;
 
 
 // Child Widget Component 
 // Selection Widget/Dialog/GO
 QWidget* VOIPWgt, *IMWgt, *SMSWgt;
 QDialog* VOIPConfigDlg, *AddContactDlg, 
  *DeleteContactDlg, *ManageContactDlg;
 
 // VOIP Widget Component
 QLineEdit* display;
 QPushButton* call, *hangup, *One, *Two, *Three, 
  *Four, *Five, *Six, *Seven, *Eight, *Nine, 
  *DotSign, *Zero, *Hash;
 QErrorMessage* errorMsg;
 
 // VOIP Log Dialog Component
 QDialog* VOIPDebugDlg;
 QTextEdit* logText;
 
 // VOIP Call Record Widget Componenet
 QDialog* CallRecordFileNameDlg;
 QLabel* fileName;
 QLineEdit* fileNameLE;
 QPushButton* confirm;
 QMessageBox* msgBox;
 
 // VOIP Configuration Dialog Component
 QLabel* UserInfo, *Username, *SIPAdd, 
  *SIPAccount, *Ports, *SIPPort, *audioVideoPort,
  *NAT, *StunServer;
 QLineEdit* usernameLE, *SIPAddLE, *StunServerLE;
 QPushButton* Save, *AddSIPAcc, *EditSIPAcc,
  *RemoveSIPAcc, *SaveBtn, *DefaultBtn;
 QSpinBox* PortSB, *audioVideoSB ;
 QRadioButton* DirectConn, *RouterConn;
 
 // Third Tab
 QLabel* SIPContacts, *SIPAddress, *SIPContactList;
 QLineEdit* SIPURIAddLE;
 QPushButton* saveContact, *EditSIPAdd,
  *RemoveSIPAdd;
 
 
 // Add Contact Dialog Component
 QLabel* contactInfo, *Instruction, 
  *myEmail; 
 QLineEdit* myEmailLE;
 QPushButton* OK, *Cancel;
 
 // Delete Contact Dialog Component
 QLabel* theContactInfo, *theInstruction, 
  *theEmail;
 QComboBox* myEmailCB;
 QPushButton* Delete, *Reset;
 
 
 
 // Private Function
 void Init();
 
 void createAction();
 void createMenu();
 void createToolBar();
 
 void createVOIPWidget();
 
 void createVOIPConfigDlg();
 
 void createAddContactDlg();
 void createDeleteContactDlg();
 void createManageContactDlg();
 
 
 // Utility Function
 bool ValidateSIP(const std::string&, bool&, int&) const;
 
 
 
 
// =================== VOIP ====================
public:
 
 typedef boost::shared_ptr<VOIP> VOIPPtr;
 
private:
 
 VOIPPtr obj;
 
};

And this is my openCV Video streaming code.

Code:

class OpenCVQT : public QWidget
{
 Q_OBJECT
 
public:
 typedef unsigned char uchar;
 
public:
 OpenCVQT(QWidget *parent = 0, Qt::WFlags flags = 0);
 ~OpenCVQT();
 
 void operator()();
 
 void StreamCamera();
 
 void InitCam();
 void ConvertImage();
 void CreateQImage();
 void SetDisplayImage();
 
private:
 Ui::OpenCVQTClass ui;
 QLabel* myLabel;
 QVBoxLayout* mainLayout;
 
private:
 CvCapture* myCaptureHandler;
 IplImage* myOriginalIplImage, *myRGBIplImage;
 QImage myQImage;
 uchar* ImageData;
 
 void CreateImage();
};
 
OpenCVQT::OpenCVQT(QWidget *parent, Qt::WFlags flags)
	: QWidget(parent, flags), 
	myCaptureHandler(), 
	myOriginalIplImage(&IplImage() ), 
	myRGBIplImage(&IplImage() ), 
	myQImage(QImage()), 
	ImageData()
{
 ui.setupUi(this);
 myLabel = new QLabel;
 mainLayout = new QVBoxLayout;
 
 mainLayout->addWidget(myLabel);
 this->setLayout(mainLayout);
 
 myCaptureHandler = cvCreateCameraCapture(0);
 myOriginalIplImage = cvCreateImage(cvSize(320, 480), 
   IPL_DEPTH_8U, 3);
 myRGBIplImage = cvCloneImage(myOriginalIplImage); 
 
}
// =============================================
OpenCVQT::~OpenCVQT()
{
}
// =============================================
void OpenCVQT::StreamCamera()
{
 //InitCam();
 
 //while (1)
 {
  myRGBIplImage = cvQueryFrame(myCaptureHandler);
  //cvNamedWindow("OpenCV");
  //cvShowImage("OpenCV", myRGBIplImage);
  ConvertImage();
  CreateQImage();
  //SetDisplayImage();
  myLabel->setPixmap(QPixmap::fromImage(myQImage)  );
 
 }
}
// =============================================
void OpenCVQT::InitCam()
{
 myCaptureHandler = cvCreateCameraCapture(0);
 
 if (!myCaptureHandler)
 {
  QErrorMessage* errMsg = new QErrorMessage;
  errMsg->showMessage("No Web Cam Plugin");
 }
 
}
// =============================================
void OpenCVQT::ConvertImage()
{
 cvCvtColor(myRGBIplImage, 
  myRGBIplImage, CV_BGR2RGB); 
 
 if (!myRGBIplImage)
 {
  QErrorMessage* errMsg = new QErrorMessage;
  errMsg->showMessage("Error Convert Image");
 }
 else
 {
  ImageData = (uchar*) myRGBIplImage->imageData;
 }
}
// =============================================
void OpenCVQT::CreateQImage()
{
 myQImage = QImage(ImageData, 
  myRGBIplImage->width, myRGBIplImage->height, 
  myRGBIplImage->widthStep, 
  QImage::Format_RGB888);
}
// =============================================
void OpenCVQT::SetDisplayImage()
{
 QPainter* myPainter = new QPainter(this);
 myPainter->drawImage(myQImage.rect(), myQImage);
 resize(myRGBIplImage->width, myRGBIplImage->height);   
}
// =============================================
void OpenCVQT::CreateImage()
{
 myOriginalIplImage = cvCreateImage(
  cvSize(myOriginalIplImage->width, 
  myOriginalIplImage->height), IPL_DEPTH_8U, 3);
 
 ImageData = (uchar*)myOriginalIplImage->imageData;  
 
 myQImage = QImage(ImageData, 
  myOriginalIplImage->width, 
  myOriginalIplImage->height, myOriginalIplImage->widthStep, 
  QImage::Format_RGB888); 
 
}
 
int main(int argc, char *argv[])
{
 QApplication a(argc, argv);
 OpenCVQT w;
 
 w.show();
 w.StreamCamera(); 
 
 return a.exec();
}

It just display a single image rather than sequence of live frame.
Please comment my code.

Please provide some guide to start.

Please help.

Thanks.